Sometimes my packages arrive damaged, sometimes intact, but I haven’t had any go missing. The smashed packages seem to come on days when my regular UPS driver is not driving. I recently had a FedEx delivery guy leave a signature form but he never rang the bell to see if anyone was home. DS was home and watched him leave the form from the upstairs window. He returned the next day though and rang the bell, so the package was delivered. He told me the signature had to be someone over 21 so I guess it was okay.
When I rented space in a medical office park and packages were delivered, they went to the main office if we were not present. My office staff had to check with them. Is it possible that a custodian or some other staff person from the building picked up the package?